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Duplicate of Forces, Newtons Laws & Friction Flashcards | StudBud
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Duplicate of Forces, Newtons Laws & Friction
Duplicate of Forces, Newtons Laws & Friction
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newtons laws and forces
Flashcards
27 cards
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Questions
27
Answers
1
A change in the force of gravity acting on an object will affect the object's...
inertia
mom
weight
mass
2
As a 600-N woman sits on the floor, the floor exerts a force on her of...
1200 N
6 N
6000 N
600 N
3
The force required to maintain an object at a constant speed in free space (no gravity, no friction) is equal to...
the weight of the object
the mass of the object
the force required to stop it
zero
4
The normal force
is a scalar quantity
acts perpendicular to a surface
points vertically upward
5
Which of the following is the cause of an acceleration or a change in an objects motion?
speed
velocity
net force
inertia
6
A force is exerted on the tires of a car to accelerate the car. The force is exerted by the...
road
air
tires
engine
7
What causes a moving object to change direction?
net force
acceleration
inertia
velocity
8
Which of the following is the tendency of an object to maintain its state of motion?
acceleration
force
inertia
velocity
9
An apple weighs 1 N. The net force on the apple when it is in free fall is
9.8 N
1 N
None of the above
0 N
10
Which are simultaneous, equal but opposite forces resulting from the interaction of two objects
action-reaction pairs
field forces
net external forces
gravitational forces
11
What are the units of the coefficient of friction?
The coefficient of friction has no unit
kg
m/s2
N
12
Forces always occur..
by themselves
as single quantities
in triplets
in pairs
13
A tow truck exerts a force of 3000N on a car. accelerating at 1.5 m/s/s. What is the mass of the car?
1000 kg
2000 kg
none of the above
3000 kg
14
A measure of the quantity of matter is...
mass
weight
density
force
15
A bag of sports equipment has a mass of 10.0 kg and a weight of...
0.98 N
980 N
9.8 N
98 N
16
Compared to its weight on Earth, a 10-kg object on the moon will weigh...
less
the same amount
more
17
How does acceleration of an object change in relation to its mass? It is...
inversely proportional
directly proportional
acceleration doesn't depend on mass at all
18
If a nonzero net force is acting on an object, then the object is definitely...
at rest
moving with a constant velocity
being accelerated
losing mass
19
A woman weighing 550 N sits on the floor. She exerts a force on the floor of...
5500 N
5.5 N
550 N
55 N
20
For every action there is an equal but opposite reaction is which of Newton's laws of motion?
third
second
first
fourth
21
One object has twice as much mass as another object. The first object also has twice as much...
velocity
all of the above
Inertia
gravitational acceleration
22
According to Newtons third law, if you push gently on something, it will push...
gently on you
gently on something els
on you only if you aren't moving
on something only under the right conditions
23
You would have the largest mass of gold if your chunk of gold weighed 1 N on..
Jupiter
The moon
Earth
24
A woman stands w 2 feet on a scale, the scale reads 280N. When she lifts 1 foot the scale reads...
280 N
less than 280 N
more than 280 N
25
A girl pulls on a 10-kg wagon with a constant net force of 20 N. What is the wagons acceleration?
20 m/s2
2 m/s2
200 m/s2
0.5 m/s2
26
An object weighs 30N on Earth A second object weighs 30N on the moon which has the greater mass
The one on the moon
The one on Earth
They have the same mass
Not enough information to say
27
How much does a 3.0-kg bag of bolts weigh?
58.8 N
29.4 N
14.4 N
7.2 N
